• 한국식품영양학회지
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• 제9권4호
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• pp.466-471
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• 1996

오이, 마늘, 생강, 감자 및 무의 압축특성을 규명하기 위하여 식품물성 측정기로 압축 힘, 거리 및 시간을 측정하고 이들의 상관관계를 살펴보았다. 힘-거리 및 거리-시간 곡선은 비교적 간단한 형태를 나타냈고 변곡점들이 잘 나타나지 않았다. 파괴점까지의 시간은 감자가 압축속도 60mm/min에서 11.79, 압축속도 120mm/min에서 6.16초로 가장 길었다. 마늘은 각각 9.65 및 4.55초로 적게 소요되었는데 이는 시료의 압축강도에 따른 차이 때문으로 생각된다. 파괴힘은 무와 감자는 압축속도별로 16.64∼20.00N으로 가장 컸으며, 파괴시에 시료는 탐침 밑에 뭉개어지는 거동을 보였다. 압축시험시 파괴점까지의 힘-시간과 거리-시간에 대한 회귀분석 결과 상관계수 값이 0.96이상이었으며, 시료간의 차이는 작았다. 힘-시간 곡선의 기울기는 오이와 마늘이 1.772∼3.385로 가장 켰으며, 감자가 각각 1.743 및 3.338로 작았으며, 거리-시간 곡선의 기울기와는 반비례 관계를 나타냈다.

• Journal of the Korean Wood Science and Technology
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• 제36권3호
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• pp.61-69
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• 2008

구조부재의 압축성능을 검토하기 위하여 낙엽송 소재에 대해 섬유방향 및 섬유직각방향 압축시험을 행하였다. 시험편의 길이와 가압판의 크기에 따른 압축성능을 검토하였으며 현행 기준의 최소끝면거리의 적정성에 대해 검토하기 위하여 다우얼 지압지점으로부터 시험편의 섬유방향에 대해 변형율 변화를 측정하였다. 가압판의 크기에 따라 압축성능은 다르게 나타났으며, 다우얼형 파스너의 최소끝면거리(end distance)는 내부변형을 고려할 경우 현행 7 D보다 높게 적용하여야 안전한 것으로 나타났다.

• 한국응급구조학회지
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• 제18권1호
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• pp.7-15
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• 2014

Purpose: The purpose of the study is to evaluate the distance and location of the rescuer to patient for the effective chest compressions qualities. Methods: The subjects were 42 students who earned the basic lifesaving technique and had informed consents to participate in the study from May 1 to 20 in 2013. The position of the rescuers included model-0(reference point), model-1(10 cm distance), model-2(20 cm distance), and model-kn(kneeling up). Results: The mean depth of compression was $50.6{\pm}6.6mm$ in Model-0, $48.7{\pm}8.2mm$ in Model-1, $44.2{\pm}10.4mm$ in Model-2, and $51.8{\pm}6.0mm$ in Model-kn. There were statistically significant differences between each Model(p<.001). Conclusion: The closer distance between rescuer and patient could provide more effective chest compressions. Kneeling on the bed stance provided the deeper chest compression consistently than the stool stance.

• 복식문화연구
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• 제20권4호
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• pp.549-559
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• 2012

The purpose of this study was to analyze the comfort of sports bras by style and bra cup size. The comfort of wear was measured with compression level. The displacement of breast points (BP) after wearing a sports bra was measured. Study subjects evaluated the comfort level of the compression type and encapsulation type sports bras after walking and running. The results showed that all types of experimental sports bras provided more coverage than everyday bras. The compression type bra placed more pressure on the breast, chest, and under-bust than the encapsulation type bra. The BP distance decreased for all types. The C cup subjects' breasts were raised after wearing the sports bras. The B cup subjects had less comfort with the compression style bra than C cup subjects. The racer back style bra with high neckline and small band girth placed more pressure than others. They were difficult to don and doff and the least comfortable. These results imply that the racer back compression style sports bra was uncomfortable for women with large breast, while the encapsulation style bra with the compressing panel at upper chest was the most comfortable. The bras that shortened BP distance placed more pressure on the breast. But the bra that raised and shorted the distance of BP provided better comfort for large-breasted subjects.

• 천문학회보
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• 제37권2호
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• pp.114.1-114.1
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• 2012

To measure the magnetic field strength in the solar corona, we examined 10 fast (>1000 km/s) limb coronal mass ejections (CMEs) that show clear shock structures in Solar and Heliospheric Observatory/Large Angle and Spectrometric Coronagraph images. By applying the piston-shock relationship to the observed CME's standoff distance and electron density compression ratio, we estimated the Mach number, Alfven speed, and magnetic field strength in the height range 3-15 solar radii (Rs). The main results from this study are as follows: (1) the standoff distance observed in the solar corona is consistent with those from a magnetohydrodynamic model and near-Earth observations; (2) the Mach number as a shock strength is in the range 1.49-3.43 from the standoff distance ratio, but when we use the density compression ratio, the Mach number is in the range 1.47-1.90, implying that the measured density compression ratio is likely to be underestimated owing to observational limits; (3) the Alfven speed ranges from 259 to 982 km/s and the magnetic field strength is in the range 6-105 mG when the standoff distance is used; (4) if we multiply the density compression ratio by a factor of two, the Alfven speeds and the magnetic field strengths are consistent in both methods; and (5) the magnetic field strengths derived from the shock parameters are similar to those of empirical models and previous estimates.

• Physical Therapy Rehabilitation Science
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• 제9권4호
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• pp.275-280
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• 2020

Objective: Compression wear is an external aid which promotes performance and recovery, diminishes muscular microtrauma, reduces muscle fiber recruitment, improves neuromechanics, enhances coordinative activities, and reduces the perceived exertion. The purpose of this study was to investigate the relationship between athletic taping and compression wear on dynamic postural balance in healthy young men. The hypothesis was that the athletic taping and compression wear would affect dynamic postural balance, with athletic taping having a different effect on dynamic postural balance in healthy young adults. Design: Cross-sectional study. Methods: Thirty-seven healthy young men participated in this study. To examine the association between athletic taping and compression wear, 3 clinical measurement tools, including 5 times sit-to-stand (5xSTS), one-leg standing (OLS) test, and Y-balance test (YBT) in 5 different conditions, namely (1) non-supporting, and support with (2) athletic taping, (3) regular compression wear, (4) silicon compression wear, and (5) double-fiber compression wear were used. Results: The distance of the Y-balance test (YBT) on both the dominant and non-dominant sides showed a statistically difference among the 5 supporting conditions (p<0.05). The distance measured via the YBT in the non-support condition was significantly different than that in the other four supporting conditions (p<0.05). However, 5xSTS and OLS were not significantly different in these supporting conditions. Conclusions: The results of this study suggest that athletic taping, silicon compression wear, and double-fiber compression wear were more effective for dynamic balance than non-supporting and regular compression wear.

• 대한기계학회논문집B
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• 제22권6호
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• pp.823-831
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• 1998

In order to investigate the impulsive noise at the exit of high-speed railway tunnel and the pressure transients inside the tunnel, numerical calculations using a Total Variation Dimishing difference scheme were applied to axisymmetric unsteady compressible flow field. Some compression wave forms were assumed to model the compression wave produced in real high-speed railway tunnel. The numerical data were extensively explored to analyze the peak over-pressure and maximum pressure gradient in the pressure wavefront. The effect of the distance and cross-sectional area ratio between two-continuous ducts on the characteristics of the pressure waves were investigated. The peak over-pressure inside the second duct decreases for the distance and cross-sectional area ratio between two tunnels to increase. The peak over-pressure and maximum pressure gradient of the pressure wavefront inside the second duct increase as the maximum pressure gradient of initial compression wave increases. The present results were qualitatively well agreed with the results of the previous shock tube experiment.

• 인지과학
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• 제29권1호
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• pp.17-38
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• 2018

본 연구의 목적은 도구를 사용하더라도 닿지 않는 거리에 놓인 대상에서 도구 길이에 따라 지각된 거리가 상이한 정도로 압축되는지, 그리고 가리키는 대상에서만 도구 길이에 따라 지각된 거리가 압축되는지를 검증하는 것이다. 자기중심적 거리를 측정한 실험 1은 도구를 사용하여 닿지 않는 거리에 놓인 대상에서도 도구 길이가 길어질수록 대상까지의 거리를 더 가깝게 지각한다는 것을 발견하였다. 자기중심적 거리를 측정한 실험 2는 가리키는 대상과 가리키지 않는 대상이 시야에 공존할 때 도구 길이가 가리키지 않는 대상까지의 거리 지각에 영향을 미치지 않는다는 것을 발견하였다. 실험 3은 실험 2와 동일한 환경에서 표적과 측정 대상 사이의 거리인 대상중심적 거리를 측정하여 도구 길이가 표적의 거리지각에만 영향을 미친다는 것을 발견하였다. 이와 같은 실험 결과는 도구를 사용하여 닿을 수 없는 거리에서도 지각된 거리의 압축 현상이 나타나며 이와 같은 지각된 거리의 압축 현상은 가리키는 대상에 국한된다는 것을 시사한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.298-300
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• 2005

Satellite payload on-board date compression unit are use for saving date storage space and reducing time to transmit payload data to the ground station. The KOMPSAT-3 payload will generate higher data rate than KOMPSAT-2 due to its better ground sample distance capacity. High input data rate and limited output transmission data rate might lead excessive compression and degraded image quality. This paper presents a trade-off study about data storage capacity and compression parameters for estimated KOMPSAT-3 system.

• 한국식품과학회지
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• 제17권6호
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• pp.469-473
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• 1985

도토리묵의 관통검사와 Back Extrusion test를 실시하여 각각의 특징적인 force-distance curve를 구하였다. 관통검사시에 관여하는 compression force와 shear force의 기여도를 알기 위하여 $K{\acute{c}}$와 $K{\acute{s}}$를 계산하였다. 도토리묵의 관통에는 compression force가 훨씬 더 크게 기여하고, 도토리묵의 농도가 클수록 탐침의 지름이 커질수록 그 기여도가 더 증가하였다. Back Extrusion test에 의해 얻어지는 maximum Extrusion force는 시료량의 증감에는 변화가 없었지만, 도토리묵의 농도가 증가함에 따라서는 그 값이 증가하였다.