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Geschichtlichkeit und Naturgeschichte : 하이데거에 대한 아도르노의 입장 Adornos Ausgang von Heidegger
Schroder,Kai 慶尙大學校 1995 論文集 Vol.34 No.1
아도르노 이론의 형성에 있어 하이데거 <토대존재론 Fundamentalontologie>에 대한 그의 비판은 가장 중요한 계기 중의 하나를 이루고 있다. 하이데거와의 대결은 아도노의 초기 논문「자연사의이념」에서부터 그의 주저인 「부정변증법」에 이르기까지 광법위하게 펼쳐진다. 이러한 저작들에서 아도르노의 방법론은 어떤 누구보다도 철저함을 확인할 수 있는데, 그는 자신의 연구 대상을 발전시키고 질서지우고 평가하기 위하여 가능한 <내재적 비판>의 방법을 철저히 활용하고 있다. 이런 방식으로 아도르노는 하이데거의 이론에서 몇개의 약점을 들추어내고 있는데, 그중에 대표적인 것은 하이데거의 이론들에 나타나는 일련의 불변적인 규정들로서, 이러한 규정들 말미암아 역사라는 근원현상이 <존재>라는 실존적인 사실성에 비해 부차적인 것으로 취급된다는 것이다. <역사성>이라는 메타범주에 대해, 이 개념의 토대를 이루는 <역사>는 그 모든 열린 가능성에 도 불구하고 주체의 자기이해에, 궁극적으로는 유한한 존재가 가질 수 밖에 없는 개인적인 무상성에 묶여진다는 것이다. 이러한 관념을 아도르노는 역사적 사건에 한 불충분한 극복이라고 비판할 뿐 아니라 그것을 자신의 <자연사>라는 이념에 대치시킨다. 여기서 <역사성>의 한계는 지양되는바, 정적인 것은 역동화되며, 지극히 활동적인 것도 그 무상성에로 환원될 수 있다는 것이다.
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DIRECT DIGITAL CONTROL STRATEGIES
D.Schroder 전력전자학회 1992 ICPE(ISPE)논문집 Vol.1992 No.4
Electrical drives had been controlled in the past with cascaded control loops for current, speed and position mainly with analogue control components. The microcomputer was a new digital control tool and engineers in in-dustry and research laboratories con-how to use it. On the one hand this control tool had the advantage to decouple the design of the hard- and software, a very valuable fact in<br/> industry. On the other hand more complex control strategies could be realized, this was the starting point for the research to develop digital control strategies dedicated to drives.<br/> But drives need different control levels,<br/> the first level is the most inner control level for the power converter or inverter and the load - mainly the current control loops. These control loops need very fast dynamic response and this is up to now to some extent difficult for digital controllers with microcomputers. There specific control strategies had to develop, if the microcomputer control should provide some advantages compared<br/> to analogue control. The higher control levels for speed or position need lower dynamic response due to the inertia of the motor and the load, so microcomputer control was easier to apply. A very important area is the process control, where digital control strategies are advantageous absolutely. In this paper all three areas for digital control will be considered.
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Design Optimization for High Power Inverters
D.Schroder,H.Kuhn 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
This paper focuses on a network model for GCTs which can be used to investigate high power circuits with or without using RC-snubbers The series connection of GCTs is commonly applied in the high power inverter field Here expensive and space-consuming snubbers are applied, to overcome the problem of an asymmetric distribution of the blocking voltage among the single GCTs. As an alternative to large snubbers, a new active gate drive concept is proposed and investigated by simulation.
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Acoustic Monitoring and Localization for Social Care
Goetze, Stefan,Schroder, Jens,Gerlach, Stephan,Hollosi, Danilo,Appell, Jens-E.,Wallhoff, Frank Korean Institute of Information Scientists and Eng 2012 Journal of Computing Science and Engineering Vol.6 No.1
Increase in the number of older people due to demographic changes poses great challenges to the social healthcare systems both in the Western and as well as in the Eastern countries. Support for older people by formal care givers leads to enormous temporal and personal efforts. Therefore, one of the most important goals is to increase the efficiency and effectiveness of today's care. This can be achieved by the use of assistive technologies. These technologies are able to increase the safety of patients or to reduce the time needed for tasks that do not relate to direct interaction between the care giver and the patient. Motivated by this goal, this contribution focuses on applications of acoustic technologies to support users and care givers in ambient assisted living (AAL) scenarios. Acoustic sensors are small, unobtrusive and can be added to already existing care or living environments easily. The information gathered by the acoustic sensors can be analyzed to calculate the position of the user by localization and the context by detection and classification of acoustic events in the captured acoustic signal. By doing this, possibly dangerous situations like falls, screams or an increased amount of coughs can be detected and appropriate actions can be initialized by an intelligent autonomous system for the acoustic monitoring of older persons. The proposed system is able to reduce the false alarm rate compared to other existing and commercially available approaches that basically rely only on the acoustic level. This is due to the fact that it explicitly distinguishes between the various acoustic events and provides information on the type of emergency that has taken place. Furthermore, the position of the acoustic event can be determined as contextual information by the system that uses only the acoustic signal. By this, the position of the user is known even if she or he does not wear a localization device such as a radio-frequency identification (RFID) tag.
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The influence of atomosphere on high temperature crystal growth
Klimm, D.,Schroder, W. The Korea Association of Crystal Growth 1999 韓國結晶成長學會誌 Vol.9 No.4
The growth of crystals with high melting point$t_{fus}$$\geq$$1600^{\circ}C$ faces the researcher with experimental problems, as the choice of materials that withstand such high t is rather limited. Many metallic construction materials are in this high t range already molten or exhibit at least a drastically reduced mechanical strength. The very few materials with$t_{fus}$$1600^{\circ}C$ as e.g. W, Mo, and partially even Ir are more or less sensitive against oxygen upon heating. Whenever possible, high t crystal growth is performed under inert atmosphere (noble gases). Unfortunately, many oxides are not thermodynamically stable under such conditions, as reduction takes place within such atmosphere. A thoroughly search for suitable growth conditions has to be performed, that are on the one side "oxidative enough" to keep the oxides stable and on the other side "reductive enough" to avoid destruction of constructive parts of the crystal growth assembly. The relevant parameters are t and the oxygen partial pressure${po}_{2}$. The paper discusses quantitatively relevant properties of interesting oxides and construction materials and wasy to forecast theri behavior under growth conditions.
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