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CNG 레벨계측을 위한 Matching layer의 성능분석
이홍윤,김권세,최두석 한국융합학회 2018 한국융합학회논문지 Vol.9 No.4
본 연구는 기체연료레벨 값에 대한 정밀도를 측정하기 위하여 초음파의 음향매칭에 관한 실험적인 분석을 수행한 것이다. 연구 모델은 송신과 수신에너지를 결정시키는 세라믹 어세이 (Ceramic Assay)의 구성요소에 의하여 설계되었다. 실험 장치로는 12V-DC 전원공급장치, Control T1 Board, 오실로스코프 (DSO1072B), 초음파 프로브 그리고 패턴테이블 (Pattern T)able이 사용되었다. 불감지영역에 대한 분석결과 최대피크지점인 2.9V의 시작점을 기준으로 D (0.180m) < E (0.184m) < B (0.204m) < A (0.234m) < F (0.244m) < C (0.247m) 모델 순으로 점차적으로 불감지폭이 증가되는 특성을 확인할 수 있었다. 실험결과로부터 매칭레이어 (Matching Layer)의 치수가 Ø21*3+2t로 설계된 모델에서 가장 우수한 지향 성 에너지를 생성할 수 있었다. This work conducted the experimental analysis on ultrasonic acoustic matching in order to measure the accuracy of gaseous fuel level values. The experimental devices were used as 12V-DC supply, control T1 board, oscilloscope (DS01072B), ultrasonic probe and pattern table. The research models were designed by ceramic assay which can determine the transmitting and receiving energies. The result of the ringing area could verify the increased characteristics in the order of D (0.180m) < E (0.184m) < B (0.204m) < A (0.234m) < F (0.244m) < C (0.247m) models based on initial 2.9V of the maximum peak voltage. From the experimental results, the model designed by Ø21*3+2t of the matching layer was notable in that the most outstanding directivity energy could be created.
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金圭昌,李洪閏 대구효성가톨릭대학교 1996 연구논문집 Vol.52 No.1
Since 1981, Korean enterprise's foreign direct investments have rapidly increased over 100% as compared with previous year. These foreign direct investments were mainly invested in overseas marketing for export promotion or extraction industries for raw material acquisition. The purpose of this study is to guide the Korean enterprise's to recognize country risk which they are confronted in host countries. Analysis of the host country environment before investment will give good opportunity and good profit to investing companies, And country risk assessment will minimize or avoid losses where they are involved or invested. In this study, I tried to analyze factors which compose the environment and economic or non-economic constraints to enterprises in host countries. With these factors, I studied techniques which were developed by enterprises and international banks to assess country risk. Country risk assessment enables to plan counter-strategies against level of country risk to executives or middle managers of enterprises. Therefore, I presented the counter-strategies which enterprises developed for high-risked host countries and how they adopted them in investment decision making. But I only presented the conceptional framework of country risk and introduced foreign enterprises techniques in this paper and could not contribute to Korean enterprises developing unique techniques. I suggested that Korean enterprises, which have no analysis staff and no counter-strategies available eventhough they are already involved and invested in developing countries.
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이홍윤 효성여자대학교 산업경영연구소 1998 경영경제 Vol.16 No.-
The objective of this study is to examine systematization of methods of selecting value principles and their interrelation about normative inference including Hare's moral inference, reflective equilibrium, and moral science. Knowledge must have a firm system in its character. But if knowledge which is acquired in the uncertain conditions do not have its objectivity and contents, it is possible that it may have unceratain contents in its system. Therefore, it is necessary to systematize knowledge by means of coherence. Similarly, in the fields of moral philosophy, political philosophy, and economic philosophy, common procedures in their model building do not established clearly inconnection with the selection of normative principles. On that account, an argument concerning the selection cannot be effective and objective. In the meantime. many scholars have made special studies of classical social contract, the theory of sympathy, Hare's moral inference, normative inference, Rawls' social contract and reflective equilibrium, and moral science in selecting value principle. The structual elements of them are different among the models. Attainment to mutul consent requires rational procedure, but approaches in selecting value principles make difference between the models. For this reason, I think it is necessary to examine the methods of selecting value principles.
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功利主義와 社會契約論의 比較硏究 : 價値基準을 중심으로
李洪閏 대구효성가톨릭대학교 현대사상연구소 1998 현대사상연구 Vol.8 No.-
The philosophy of utilitarianism is based upon the doctrine of utility, which states thegreatest happiness of the greatest number. In general, utilitarianism is divided into hedonistic utilitarianism and plural utilitarianismaccording to criterion of intrinsic value, into act-utititarianism and Rule-utilitarianismaccording to ways of calculus for maximizing good, and into total utilitarianism and averageutilitarianism in accordance with calculus of utility producing the greatest good underinstitutions and acts. Regardless of forms of utilitarianism, utilitarianists regard pleasure or happiness as good,and consider that good is defined independently of justice. Namely, utilitarianism establishes happiness and satisfaction of society as a whole, andconsiders as right the relation of social framework or inter-person in order te maximize thetotal amount of happiness and satisfaction. On the contrary, Rawls'social contract places emphsis on priority of justice as comparedwith good. That is to say, good does not prescribe justice, but justice does good it called Rawls'theory of justice. Rawls criticized poblems which take place in fundamental charater, moral principle, anddistributive justice. Therefore, the objective of this study is to compare the criterion of values ofutilitarianism with that of Rawls' social contract.
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