• 교육녹색환경연구
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• 제2권2호
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• pp.15-33
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• 2002

This study purpose is extract on the architectural principles and architectural planning direction for existing school facility renovation. therefore, This study is occur to renovation from change factor and change direction of the school facility under prerequisite, school facility change direction is with a pedagogy side and it classified with the social side which it bites and it presented. School facility renovation extracted a plan principles with the base which will reach. Was extracted renovation plan Principles to analyze the interrelationship of necessary condition of school facility, It follows in renovation principle presented the renovation plan direction 61 branch.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.126-129
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• 2005

Change detections is carried out under the assumption that pixel boundaries of geometrically corrected time series satellite images cover the same location. However that assumption can be wrong when shifts in the pointing direction of a satellite sensor occurs. Currently, although the influence of misregistration on landcover change detection has been investigated, there has been little research on the influence of pointing direction shifts of a satellite sensor. In this study, a simple method for reducing the effects of pointing direction shifts of a satellite sensor is proposed: the classification of two ASTER images was carried out using the linear spectral mixture analysis, the two classification results were resampled into a geometrically fixed grid, and then the change detection of the two ASTER images was carried out by comparing the resampled classification results of the two images. The proposed method showed high performance in discriminating between changed areas and unchanged areas by removing the pointing direction shifts of a satellite sensor.

• 한국환경교육학회지:환경교육
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• 제25권1호
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• pp.117-133
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• 2012

The purpose of this study was to develop a middle school science climate change education plan. The detailed contents of the study are as follows: First, a research study was conducted for understanding climate change and the direction and contents of the climate change education were set up. Second, the climate change education plan was prepared. The middle school climate change education plan were arranged through research study. The results of the study are as follows: First, the direction and contents of the climate change education were arranged. The direction of the climate change education was arranged to reflect the global science education system, sustainable development education, and youth leadership. Second, the middle school climate change education plan was arranged. The middle school climate change education plan includes a course of study and creative experience program. The plan for the course of study focused intensely on scientific study.

• 대한토목학회논문집
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• 제8권1호
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• pp.187-196
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• 1988

본(本) 연구(硏究)에서는 유로(流路)의 방향각(方向角)과 방향편각(方向偏角)의 자료(資料)를 가지고, 자기상관계수(自己相關係數)와 variance spectrum을 이용(利用)하여 한강유역(漢江流域) 하천(河川)들에 대한 사행특성(蛇行特性)을 분석(分析)하였다. 사행파장(蛇行波長) 산정(算定)에는 방향각(方向角) spectra 보다는 방향편각(方向偏角) spectra의 이용(利用)이 더 좋음을 알 수 있었으며, 방향편각(方向偏角) spectra로부터 산정(算定)된 지배사행파장(支配蛇行波長)은 북한강수계(北漢江水系), 남한강수계(南漢江水系), 한강하류수계(漢江下流水系) 하천(河川)들 순(順)으로 점차(漸次) 크게 나타나는 경향(傾向)을 보였다. 또한, 유로(流路)의 방향각(方向角) 및 방향편각(方向偏角)의 spectra로부터 북한강수계(北漢江水系), 남한강수계(南漢江水系), 한강하류수계(漢江下流水系) 하천(河川)들의 사행성향(蛇行性向)을 알 수 있었다. 방향각(方向角) 및 방향편각(方向偏角)에 대한 autocorrelogram들은 일반적(一般的)으로 진동(振動)하면서 감쇠(減衰)하는 모양을 보였으며, 방향편각(方向偏角)의 자료(資料)를 가지고 자기상관계수(自己相關係數)와 spectra로 구한 사행파장간(蛇行波長間)에는 상관성(相關性)이 높은 선형관계(線形關係)를 보였다.

• 소음진동
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• 제5권2호
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• pp.247-256
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• 1995

In this paper, double exposure holographic interferometry using ruby pulse laser is formed in order to investigate the propagation of transient waves. The vibration characteristics according to the change of impact load direction, i.e., impacted in the shear direction and in the normal direction are analyzed. It was observed that the macroscopic trends of transient wave generation and propagation in the assembly of precipitator plates were almost similar regardless of the change of impact load direction. But the propagation and mixing of transient wave was advanced relatively slowly when impacted in the normal direction.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 심포지엄 논문집 정보 및 제어부문
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• pp.12-14
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• 2006

This paper presents a novel scene change detection method using intra prediction mode and edge direction in H.264/AVC. When scene change occurs, there are less temporal correlation between frames, most of macro-blocks encoded in intra mode. Using this property, the method calculates the percentage of intra mode blocks in each predictive frame in order to get candidates of scene change frame. To further find scene change, we obtain edge histogram of each candidates by using eight prediction direction of intra prediction mode in H.264/AVC. We detect scene change frames with $\iota^1$-norm of edge histograms. The experimental results show that the method is efficient and robust.

• 한국정밀공학회지
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• 제24권10호
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• pp.37-45
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• 2007

End-milling is intermittent cutting process performed by a tool with a number of teeth. Its cutting forces are commonly measured by the tool dynamometer which has rectangular coordinates. In this case, the pattern of cutting forces is different according to cutting conditions. At a certain cutting condition, the sign of cutting force changes from positive to negative during a revolution of one tooth. The change of force direction excites a cutting tool and severe vibration arises when radial depth of cut increases. In this study, cutting experiments and simulations were carried out in order to explain the cause of the change of the cutting force direction. In addition, the effect of the cutting force change was discussed in terms of chatter vibration in end milling.

• 한국분무공학회지
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• 제28권4호
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• pp.198-206
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• 2023

In this study, visualization of in-cylinder spray behavior and spark channel stretching by air flow characteristics depending on engine operating conditions were investigated. For in-cylinder spray behavior, increase in engine rpm did not alter the counter-clockwise air flow direction and location of in-cylinder dominant air flow but increased average air flow velocity, which hindered spray propagation parallel to the piston surface. When injection timing was retarded, direction of in-cylinder dominant air flow was changed, and average air flow velocity was reduced resulting in an increase in spray penetration length and change in direction. For spark channel stretching, increase in air flow speed did not affect spark channel stretch direction but affected length due to increase in spark channel resistance and limitation of energy ignition coil can handle. Change in air flow direction affected spark channel stretch direction where the air flow was obstructed by ground electrode which caused spark channel direction to occur in the opposing direction of air flow. It also affected spark channel stretch length due to change in air flow speed around the spark plug electrode from the interaction between the air flow and ground electrode.

• 펄프종이기술
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• 제31권5호
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• pp.73-85
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• 1999

Yield and fracture are separated in the tensile failure of paper. Failure in the machine direction of photocopy paper is contrasted with failure in the cross-machine direction . The ratios of distortion (shape change) to dilatation (volume change) for individual elements at yield and fracture are described. The ratios of distortion to dilatation are measured and compared to predicted values of the strain energy density theory. To evaluate the effect of the angle from the principal material direction on the strain energy density theory. To evaluate the effect of the angle from the principal material direction on the strain energy density factor, samples are prepared from machine direction to cross-machine direction in 15 degree intervals. the strain energy density of individual elements are obtained by the integration of stress from finite element analysis with elastic plus plastic strain energy density theory. Poison's ratio and the angle from the principal material direction have a great effect ion the ratio fo distortion to dilatation in paper. During the yield condition, distortion prevails over dilatation . At fracture, dilatation is at a maximum.

• 한국의상디자인학회지
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• 제17권2호
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• pp.145-154
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• 2015

This study aims to identify the differences of body image when the stripe direction and width change of semi-tight skirt. The semi-tight skirt pattern was made using the standard size of a women in their 20s. 12 semi-tight skirt models combining 6 kinds of stripe directions and 2 kinds of stripe widths were made using CLO 3D virtual clothing system. The data was evaluated by 126 fashion design majors. The results were as follows; In accordance with the body image factor analysis of semi-tight skirt, three image factors were identified; whole body optical illusion, calf optical illusion and hip optical illusion. Among these factors, the whole body optical illusion factor is the most important factor. The body image depending on the stripe direction and width change of semi-tight skirt mostly showed the significant difference. In accordance with the analysis on the interaction effect of body image depending on the stripe direction and width change of semi-tight skirt, the whole body, calf and hip optical illusion factors showed the significance. The interaction of body image had independent influence on all factors of stripe direction and width. In particular, the interaction of stripe direction and width had the most significant influence on the whole body optical illusion.