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호프栽培에 對한 實驗的 考察 : 忠北에 있어서 in the chung puk province
朴然圭 忠南大學校 1962 論文集 Vol.2 No.-
This experiment was planned to determine the possibility of Hop cultivation in chung puk province and the results of research conducted in the last three years may be summerized as follows. 1. The cultivation of Hop plants is possible, but the deterioration of quality is inevitable in this province. 2. The cultivation of Hop plants will be possible using the low supports of about sixfeet, but the larger deterioration of the products in both quality and quantity is to be expected. 3. The profitable cultivation of Hop plants is difficult for us in the region as this province where the natural conditions are not suitable for Hop cultivation, it we shall be unable to improve the mothods of cultivation and rearing the excellent varieties in future.
박연규,김양한 한국소음진동공학회 1997 소음 진동 Vol.7 No.5
Wigner-Ville distribution which is a time-frequency analysis has a fatal drawback, when the signal has multiple components. This is the cross-talk and often causes a neagative value in the distribution. Wingner-Ville distriution is an expression of power, therefore the cross-talk must be avoided. Smoothing the Wigner-Ville distribution by convoluting it with a window, is most commonly used to reduce the cross-talk. There can be infinite number of distributions depending on the windows. But, the smoothing reduces resolution in time-frequency plane; this motives to design a more effective window in reducing cross-talk while remaining resolution. The domain in which the cross-talk and legitimate components can be easily distinguished, is the ambiguity function. In the ambiguity function domain, the legitimate components appear as linear lines passing through the orgine. But, the cross-talk is widely distributes in the ambiguity function plane. Based on the relative distributions of cross-talk and legitimate components, rotating window can be designed to minimize cross-talk. Applying the rotating window to the ambiguity function corresponds to smoothing the Wigner-Ville distribution. Therefore, the effects of rotating window is estimated in terms of the bias error due to smooting the Wigner-Ville distribution. By applying the rotating window, not only the Wigner-Ville distribution but also its properties are changed. The properties of the new distribution are checked, in order to complete analyzing the rotating window.
Reduction of deadweight pendulum motion and its conformation by using a build-up system
박연규,Dae-Im Kang,Jong-Ho Kim,Min-Seok Kim 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.11
Deadweight force machines cause oscillating components strongly related to the pendulum motion of the deadweight in the measured force signals. An estimating method of the pendulum motion using a build-up system has been proposed in previous papers. In this paper, the estimation algorithm was confirmed by comparison with the directly measured trajectory through the analysis of a 500 kN deadweight force standard machine in Korea Research Institute of Standards and Science. After the dynamic analysis of the force machine, it was modified to decrease the pendulum motion effects by accurately controlling its loading speed. As a result of the modification, the oscillating level due to the dynamic behavior of the force machine has been reduced considerably.
순간 진동수 추정 방법론의 비교와 외팔보, 엔진 블록 및 자동차 문 진동에의 적용예
박연규,김양한 한국소음진동공학회 1993 소음 진동 Vol.3 No.4
Although a frequency analysis by FFT algorithm has been widely used in the vibration community, this approach has somewhat limited features when an analysist want to see the details of frequency trends because FFT shows only energy contents along frequencies. So the concept of instantaneous frequency that represents the dominant frequency component at each time needs to be introduced. In this paper, to get the instantaneous frequency, two methods are used. Methods using Hilbert transform and evolutionary spectrum are those. One of the problems of estimating instantaneous frequency using Hilbert transform is that it is normally very sensitive to signal to noise ratio(SNR) because of the differentiation. Moving window is applied on the estimation of instantaneous frequency, and instantaneous frequency histogram are used to handle this problem and proved to be very effective. Computer simulations for various signals have been done to understand the characteristics of instantaneous frequency. The usefulness of signal analysis using instantaneous frequency was tested by three simple experiments, which were engine experiment, beam experiment, and car door experiment. The instantaneous frequency analysis is found to be a useful technique to analyze the signals that have time varying frequencies.
박연규 아시아교정포럼 2011 교정담론 Vol.5 No.1
이 글에서는 국내 교정윤리강령의 의의와 이론적 근거, 그리고 체제 방식에 대해 논의하고자 한다. 논자는 재소자를 단순히 수용하는 것으로 교도소의 역할을 다했다고 할 수 없고, 그들이 안전하게 사회에 복귀하도록 도와주고 살펴주는 것이야말로 교정의 진정한 역할이며 완성이라고 생각하고 있다. 이를 위해 교정윤리에 대한 재고가 있어야 하며 윤리강령은 주요한 이러한 교정의 완성을 위한 한 축을 담당한다고 본다. 이를 위해 교정윤리를 교도관과 재소자 사이의 인간적이고 윤리적 관계를 모두 함의하는 것으로 규정했다. 그리고 그들 사이의 인간적이고 윤리적 관계를 이상을 다양한 형태의 윤리강령의 항목으로 구성하고자 했다. 이 글은 다음과 같은 순서로 진행한다. 첫째, 교도관의 자율성과 책임을 논의하면서 교정의 전문성과 윤리성의 발달 관련을 비교 분석한다. 둘째, 교정윤리 강령의 항목조건과 필요조건을 논의한 뒤, 국내의 유사한 윤리강령과 미국의 교정윤리 강령을 평가한다. 셋째, 교정윤리 강령의 실제적인 항목의 근거를 시안 수준에서 마련하고자 한다. 결론적으로 윤리강령에 대한 교정본부의 관심을 촉구했으며, 본격적인 한국적 교정윤리 강령을 마련하기 위한 조사연구가 이루어져야 함을 주장했다. 그리고 강령을 만듦에 있어 국내 실정에 맞는 ‘한국적 교정’의 필요성을 언급했고 몇 가지 제안을 제시했다. 마지막으로 제대로 된 교정윤리 강령의 제작을 통해 교정의 합리화와 건전성을 확보하고, 사회적 공익에도 이바지할 수 있음을 설명하고자 했다.