• Proceedings of the Korea Contents Association Conference
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• 2006.05a
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• pp.398-400
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• 2006

The symplectic form based on a symplectic space is introduced to simplify a probe compensation equation in terms of the near-field measurement algorithm. The Lorentz reciprocity principle is also utilized for a near-field probe compensation equation. Applying the symplectic form to the probe compensation equation gives a simplified probe equation, thus confirming the validity of our approach.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.11b
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• pp.1089-1092
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• 2001

In order to measure the vibration of a ribbed clindrical shell, the principle of reciprocity has been implemented. An accelerometer was fixed at the position defined as the excitation point. An impact hammer was used to tap at the response array points (64 points) located along the circumference of the shell. The frequency response function was reciprocally measured at each point in turn. The response data was processed to obtain the frequency/wavenumber spectrum. From the spectrum the characteristics of wave propagation on the ribbed cylindrical shell have been observed.

• Journal of the Economic Geographical Society of Korea
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• v.21 no.3
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• pp.254-269
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• 2018

The aim of this paper is to identify the components of the sustainable regional ecosystem of social economy enterprises (hereafter 'regional ecosystem'), and to explore the principles of reciprocity, regard and public policy, which have a fundamental impact on the development of such regional ecosystem. The regional ecosystem is an interactive system of the stakeholders who are related to the process of planning, producing, distributing and selling goods and services, and the agents who maintain and spread their social value orientation. This system operates through the interaction of 'local network (business relations and social relations)', 'intermediary organization' and 'public role.' On the basis of the conceptual framework on the regional ecosystem, the result of the in-depth analysis on the case of Gorang-erang Coop shows the interaction of reciprocity and public policy with respect to regard within the context of a characteristic of the regional ecosystem.

• The Journal of Korean Philosophical History
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• no.29
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• pp.125-152
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• 2010

The main purpose of this dissertation is a introductive proposal to reconstruct confucian moral principles. The most classical question in moral principles is : what is the good. In order to reconstruct confucian moral principles, this dissertation begin with question of what is the good in confucian moral principles. Confucianism believe in reality of the human good mind and good nature. Confucian the human good mind and good nature is comprised of benevolence, righteousness, propriety and wisdom. Benevolence, righteousness, propriety and wisdom(四德) is the origin of morality. Confucian's moral principles of human relationship is none other than conscientiousness and altruism. Conscientiousness is a principle of self-cultivation and self-revelation. As to altruism, confucious said, "the man of perfect virtue, wishing to be established himself", or "do not impose on others what you do not desire others to impose upon you." Altruism is rectified as a principle of reciprocity methodology of the making of whole kingdom peaceful in The Great Learning. Confucian golden rule(conscientiousness and altruism is equal to Kantian categorical imperative in The Fundamental principles of Metaphysics of Ethics. : Act only on that maxim through which you can at the same time will that it should become a universal law ... etc. Kant's three principles of moral philosophy(Categorical Imperatives) imply that the idea of universality, freedom, and the kingdom of ends. We contrast confucian moral principles with Kant's three principles of Categorical Imperatives. In conclusion, confucian moral principles implicate Kant's principle of universalizability and impartiality.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.22 no.8
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• pp.720-728
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• 2012

It is important for identification of noise and vibration problem of tire to consider influence of interaction between road and tire. A quantification of road noise is a challenging issue in vehicle NVH due to extremely complicated transfer paths of road noise as well as the difficulty in an experimental identification of input force from tire-road interaction. A noise caused by tire is divided into road noise(structure-borne noise) and pattern noise(air-borne noise). Pattern noise is caused by pattern shape of tire, which has larger than 500 Hz, but road noise is generated by the interactions between a tire and a vehicle body. In this paper, we define the quantitative analysis for road noise caused by interactions between tire and road parameters. For the identification of road noise, the chassis dynamometer that is equipped $10mm{\times}10mm $ square cleat in the semi-anechoic chamber is used, and the tire spindle forces are measured by load cell. The vibro-acoustic transfer function between ear position and wheel center was measured by the vibro-acoustic reciprocity method. In this study three tires with different type of mechanical are used for the experiment work.

• (The)Study of the Eastern Classic
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• no.36
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• pp.7-30
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• 2009

Confucius said, "at fifteen, I had my mine bent on learning, At thirty, I stood firm, At forty, I had no doubt, At fifty I knew the decrees of Heaven, At sixty, my ear was an obedient organ for the reception of truth, At seventy, I could follow what my heart desired, without transgressing what was right." This dissertation's aim is to articulate the ideas and methodology of 'learning to become a sage' based upon his saying. Confucius believe in reality of the human mind & it's nature. What Heaven has conferred is called the human nature. An accordance with this human nature is called path of human duty. Confucius's concept of human path is realization of humanness. Confucian's Human relationship is none other than conscientiousness and altruism. This Rule is expressed in the confucian version of reciprocity: "What you do not wish for yourself, do not do to others." Confucian principles of reciprocity imply is equal to Kantian Categorical imperative. This principles imply universalizability and equal consideration.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.8A
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• pp.618-631
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• 2012

In this paper polarization adaptivity on transmit has been used to enhance the received signals directed to a pre-selected receiver in a near-field multi-input multi-output (MIMO) environment. The objective here is to select a set of weights on the transmitting antennas adapted to individual receivers based on the principles of reciprocity. Using the polarization properties, when the number of receiving antennas is greater than the number of transmitting antennas, the transmitted signal may be directed more to a particular receiver location while simultaneously minimizing the reception signal strength at other receivers. Numerical simulations have been made to illustrate the novelty of the proposed approach.

• Journal of KSNVE
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• v.9 no.4
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• pp.822-827
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• 1999

The reduction of booming noise level and improvement of sound quality in the vehicle interior have been major fields of vehicle NVH for many years. In order to reduce the booming noise this paper proposed a system variable, which takes account of mode shapes and natural frequencies of the structural-acoustic system, measurement points and excitation frequency. By simplifying the system variable, the major contributors of panels inculding roof, roof lining, wind shield glasses, doors and floor to booming noise at a specific frequency was experimentally found. Also the relationships between structural modes of roof lining, one of the major contributors, and acoustic modes of compartment cavity were investigated from the viewpoint fo structure-borne noise. In addition, the roof lining was modified structurally by applying marble sponge to the gap between roof and roof lining. Asthe result of structural modification, the booming noise was reduce at target frequency.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2008.04a
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• pp.928-933
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• 2008

본 연구에서는 최적 빔포머 (optimal beamformer)를 이용하여, 높은 지향특성을 갖는 라우드스피커 어레이를 구성하였다. 센서 어레이 시스템에 널리 적용되는 빔포밍 방법은 상반성 (reciprocity)의 원리에 의하여 라우드스피커 시스템에도 적용이 가능하다. 음원의 개수 및 배치 간격과 같은 최적 빔포머의 설계 변수와 지향성과의 관계를 살펴보고, 잡음 증폭을 억제하기 위해 적용되는 안정화 계수 (stability factor)도 유용한 설계 변수로 활용하였다. 또한 라우드스피커 자체가 갖는 지향성과 반사와 산란 등을 고려하여 빔포머를 최적화하는 방법을 제안하였고, 이 방법을 통해 예측치와 실제 시스템과의 차이를 줄였다. 실행 예제로 실제 어레이 시스템을 구성하고, 모의 실험과 실제 측정을 수행하여 성능을 확인하였다.

• 한국지구물리탐사학회:학술대회논문집
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• 2006.06a
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• pp.181-186
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• 2006

An imaging method of seismic sources using time-reversal wave propagation is presented. The method is based on the time-reversal invariance and the spatial reciprocity of the wave equation. Time-reversal wave propagation has been used to image anomalous features of a midium in medical imaging, non destructive testing and waveform tomography. Seismogram is the record whose energy is propagated from the seismic source. If time-reversed seismogram propagates back into the medium, seismic energy is concentrated at the origin time of the event and at the source location. In this work, a staggered-grid finite-difference method of the elastic wave equation is parallelized for 3-D wave propagation simulation. With numerical experiments, we show that the time-reversal imaging will enable us to explore the spatio-temporal history of complex earthquake.